Valve-spring.



G. H. M. CANTON, P. G. UNNE & E. J. J. SALMSON.

VALVE SPRING.

APPLICATION FILED N0v.27. I912.

Patented Sept. 28, 1915.

ANOQRAPH co, WASHINGTON. D. c.

pnrrsrnns r GEORGES nnnninnnrus cnn'ron, rIEnnEjeEonGss UNNE, Am) EIIIILEJEANJUIlEEi f v SALMSON, or BILLANGOURT, FRANCE.

vAnvE-srrtme:

Patented Sept. 28, 1915.

Original application filed Marelr29,.l9l2, Serial No. 687,011. 1 Div'ided'and this application filed November 27, 1912; Serial-Nor733fi65.

To all whom it may concern: I

Be it known that we, GEORGES HENRI llLURIUS CANTON, PIERRE GEoRcEs UNNE, and EMILE JEAN JULEs SALMSON, respectively citizen of France, subject of the King of Sweden, and citizen of France, residing at- 9 Avenue des Moulineaux, Billancourt, Seine, in the Republic of France, have invented new and useful Improvements in Valve-Springs, oi which thefollowing is a specification.

Thisinvention relates to valve springs and more particularly to springs adapted to return to their seats the valves of explosion engines. In engines of this typeactually in use, stoppages frequently occur which are very dangerous when the engines are mounted on aeroplanes since they may cause the machine to fall. These stoppages may be due to the defective operation of the valves caused by a molecular change. in the material constituting the recoil springs. This invention removes all these disadvantages as the effective parts of the improved springs are at some distance from those portions of the engine which are liable to heat or an neal the springs, whereby the latter always retain their elasticity.

According to the invention, the springs are formed each by a steel wire wound in such a manner as to form one or more elastic coils remote from the parts of the engine which are liable to heat them. i

The present application is a division-0f our copending application Serial Number 687011, filed March 29, 1912.

The invention is illustrated, by way of example, in the accompanying drawing in which s Figure 1 is a vertical section along the line A-A, Fig. 2, through one end of an engine cylinder, showing in side elevation a valve and its spring; Fig. 2 is a corresponding plan view.

The admission and exhaust valves 05 b, are each returned to their seats by a spring 0 formed of a steel wire bent back at its middle portion in such manner as to form an eye or loop 0 through which the corre sponding valve stem (Z or f extends. The loop 0 is held against upward movement by a cotter g. The two parts of the wire at both sides of the loop 0 are coiled in inverse directions at c in such manner as to form a double spring. The extremities c of the wire are held by a metallic plate it which. rests on the box or casing i or 7' of the corresponding valve and is provided with two lugs 71 intendedto retain the ends of the wire. When the valve opens, the loop 0 of the spring is drawn toward the cylinder and the coiled parts 0 of the spring are slightly wound up so that the reaction of said coiled parts will cause the valve to close when the force which tends to open the valve is removed. The spring thus formed has the advantage that its effective parts 0 are at some distance from those portions of the engine which are liable/to heat or anneal the spring. This spring thus always retains its elasticity.

Having now described our invention, what we claim as new and desire to secure by Letters Patent is:

1. In combination, a valve having a projecting stem, and means for closing said valve, said means comprising a spring formed of an integral strand having intermediate oppositely wound coaxial coils remote from the valve,-intermediate arms extending from adjacent parts of said coils, respectively, and bent to form a loop engaging said valve stem, terminal arms tensioned by engagement with the casing of said valve, and means for retaining said loop in positlon.

2. In combination, a valve having a projecting stem and lugs projecting from the valve casing,and means for closing said valve, said means comprising a spring formed 01'' an integral strand having intermediate oppositely wound co-axial coils remote from the valve, intermediate arms extending from adjacent parts of said coils, respectively, and bent to form a loop engaging said valve stem, and terminal arms frictionally engaging the lugs projecting from the valve casing.

3. In combination, a valve having a projecting stem, a pin passing through said stem at rightangles to its axis, a valve casing having lugs projecting therefrom, and means for closing said valve, said means comprising a spring formed of a strand havin intermediate oppositely wonnd eo-aizial 1 names to this specification in the presence of 10 0011s remote from the valve lntermedlate two subscribing Witnesses.

arms extending from adjacent parts of said GEORGES HENRI M CANTON coils, respectively, and bent to form a loop PIERRE GEORGES UNNE engaging said valve stem and pressing EMILE AN JULES SAIMSON against said pin, and terminal arms ten- J sioned by frictionally engaging the lugs pro- Witnesses:

jecting from the valve casing. ANTOINE LAVUX,

{In testimony whereof We have signed our HANsoN O. Come.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. G. 

